Spot varnishing roll



Sept. 8, 1936. H DULLINGER 2,053,604

SPOT VARNI SHING ROLL 7 Filed July 18, 1954 Patented Sept. 8, 1936 SPOT VARNISHING ROLL- James H. Dullinger, Chicago, Ill.,, assignor to Continental Can Company, Inc., New York, N. Y., a corporation of New York Application July 18, 1934,. Serial No. 735,878

1 Claim.

The invention relates tonew and useful. im provements in varnishing rolls for spotting metal sheets with a coating of varnish, color or the like.

An object of the invention is toprovide a. varnishing roll with separate resilient applying pads arranged in order thereon to correspond to the desired arrangement of spotting onthe metal sheet and wherein each applying pad is attached to a metal base and each metal base is independently secured to the roll so that said pads may be interchanged or replaced as desired.

A further object of the invention is to provide a varnishing roll of the above type wherein the securing means for the individual pads is so constructed that the pad may be adjusted longitudinally and circumferentially of the roll to which it is attached.

In the drawing:

Figure 1 is a perspective view of a varnishing roll having the improved means applied thereto.

Figure 2 is a view partly in end elevation and partly in section of the varnishing roll.

Figure 3 is a sectional view through a portion of one of the pads and the roll in a plane at right angles to the axis of the roll.

Figure 4 is a sectional view through one of the pads and a portion of the roll in a direction 1ongitudinally of the roll.

Figure 5 is a diagrammatic view showing a metal sheet which has been spotted by the improved varnishing roll.

The invention as illustrated resides in a varnishing roll indicated at I in the drawing which is provided with the usual trunnions 2 for the mounting of the same. Attached to the var nishing roll are a series of varnish applying pads. As shown, there are five rows of pads and five pads in each row. The pads in adjacent rows are staggered relative to each other. Each var- 40 nishing element consists of a metal supporting base 3. Attached to this base is a resilient varnish applying pad 5 of soft vulcanized rubber. The pad may be made up of layers of rubber and fabric or constructed in any suitable way so long as it has a rubber face and is resilient. This varnishing pad of rubber constituents is secured to the metal base 3 by cementing so that the varnishing pad and the metal base are firmly attached and form a unit. The pad may be of any configuration. As shown it is circular in outline; but it may be oval, triangular, square, pentagonal or, in fact, any shape desired for spotting the sheet.

The metal base 3 is of larger diameter than the varnishing pad so that there is a flange of metal extending all the. way around the varnishing pad. This flange. is indicated at 6. The base is. shaped to conform to the surface of the roll which is cylindrical. The roll is preferably provided with dowel pins: 1, l: which enter openings: 5 8, 8 in the flange of the metal base. The metal base is attached to the roll by screws 9, 9: which pass through holes in the flange and are threaded into the roll. The clamping screws. may be of any desired construction and as shown there are two 10 screws arranged at diametrically opposite points and in a line at right angles to a line containing the dowel pins 1, 1. This provides a means whereby the varnishing pads are separately attached to the roll and any one may be removed without disturbing the others. After the varnishing pads are attached to the roll, then the varnishing faces of the pads are shaped so as to produce a truly cylindrical surface containing all of the varnishing pads. The roll may be used in any type of machine. It may be used in a lithograph press or between the lithograph press and even so that as the printed sheet is discharged from the lithograph press, it is carried through the coating machine and the varnishing pads apply a spot of varnish to the lithographed figure on the sheet.

In Figure 5 of the drawing, a sheet is. shown at III, which sheet has been spotted through con,- tact with the varnishing pads on the rolls shown in Figures 1 and 2. The spots of varnish applied to the sheet are indicated at |I,- H. These varnishing pads are so dimensioned and positioned relative to the figures or decorations lithographed on the sheet that a coating of varnish is applied over the decorations, covering the same and only throughout the region where it is desired to protect said decorations. In other words, if the sheet is to be cut into round blanks to form a can end or some other part of a metal article, it is only desired to decorate the end which is tobe cut out and to coat that part which is to be cut out. The varnishing pads are arranged in an order on the roll to correspond to the desired arrangement of the spotting on the metal sheet. If a pad becomes worn, it can be readily removed and replaced without interfering with the securing means for the other pads.

In Figure 3 of the drawing a slightly modified form of securing means is shown, wherein the opening in, the flange which is indicated at I2 is of larger diameter than the screw which secures the plate to the roll. The dowel pins are omitted and this permits the plates to be shifted longitudinally of the roll or circumf-erentially of the roll, or in fact in any direction through these combined movements within the limits of the size of the opening l2 relative to the shank of the screw. This provides for a nicety of adjustment so that the pads may be placed for proper registration with the regions with which it is desired to spot. Thus it is that perfect alignment of work such as coating and varnishing may be accomplished. Then again, as has already been noted, where the pads are separate and separately attached, replacement can be readily accomplished of any or all of the pads in the event of excessive wear. It will be noted that if some of the parts wear to a greater extent than others, they may be shimmed up individually.

While the pad is described as formed of soft vulcanized rubber, it will be understood that it can be made of other material which is soft and capable of use for applying varnish. It is essential, however, that the material shall be resilient and that it will not shrink or enlarge from the solvents used in the varnish.

It is obvious that minor changes in the details of construction and the arrangement of parts may be made without departing from the spirit of the invention as set forth in the appended claim.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

A varnishing roll for spotting metal sheets comprising a cylindrical roll, a series of varnish applying devices carried thereby and arranged in order thereon to correspond to the desired arrangement of spotting on the metal sheet, each device including a metal base shaped to conform to the surface of the roll and a resilient pad rigidly attached to the said base, said metal base extending beyond the periphery of said pad so as to provide an integral holding flange, said holding flange having a plurality of spaced openings therethrough, and a holding screw passing through each of said openings into the roll for securing each of said varnish applying devices to the roll, each of said holding screws having a shank portion of a diameter substantially less than the diameter of the openings in said flange whereby to permit independent universal adjustment of each of said varnish applying devices relative to the roll and having a head portion of greater diameter than the said openings and adapted to contact only with the external surface of said flange whereby to hold the varnish applying devices in adjusted position.

JAMES H. DULLINGER. 

